Table 2 Tooth brushing performance of 10- and 15-year-olds

Tooth contact time (s)

195.8 (74.6)

196.1 (75.8)

 Inner surfaces

33.2 (33.7); 19.3 (5.7, 62.2)

30.4 (26.7)

 Outer surfaces

71.9 (36.2)

95.3 (54.9); 78.2 (57.7, 125.3)

 Occlusal surfaces

90.7 (42.7)

70.3 (36.0)

% of tooth contact time

 Inner surfaces

15.3 (13.8); 13.2 (2.8, 25.1)

15.8 (11.5)

 Outer surfaces

36.9 (13.1)

47.4 (14.7)

 Occlusal surfaces

47.8 (16.6)

36.8 (13.3)

% of movements on inner surfaces^a,b

 Circular^c

1.0 (5.6); 0.0 (0.0, 0.0)

0.7 (3.3); 0.0 (0.0, 0.0)

 Horizontal

54.6 (39.7); 62.4 (7.2, 93.8)

68.8 (36.2); 85.9 (32.0, 98.2)

 Vertical

44.3 (40.2); 33.0 (6.2, 92.8)

30.5 (35.2); 14.1 (1.8, 67.6)

 No movements^d

0.2 (0.5); 0.0 (0.0, 0.0)

N/A

% of movements on outer surfaces^b

 Circular

39.9 (35.9); 27.0 (0.0, 78.9)

44.0 (36.6); 46.4 (0.3, 75.8)

 Horizontal

53.7 (37.9); 55.0 (13.9, 95.6)

51.1 (39.2); 42.7 (17.5, 98.4)

 Vertical^e

5.2 (17.2); 0.0 (0.0, 0.8)

4.5 (9.7); 0.0 (0.0, 3.7)

 No movements^d

1.2 (2.1); 0.0 (0.0, 1.3)

0.4 (0.7) 0.0 (0.0, 0.8)